Translation of "to convince" into Spanish

It would be virtually impossible to convince Tom to come along with us.

Sería virtualmente imposible convencer a Tom de ir con nosotros.

They're all trying so hard to convince themselves that they have nothing to be afraid of.

Se esfuerzan tanto por convencerse de que no tienen qué temer.

Then maybe you can tell me how to convince a female twice my size that I'm not interested.

Entonces, tal vez pueda decirme cómo convencer a una mujer que me dobla el tamaño que no estoy interesado.

The teacher tried to convince the boy to put the neckerchief on, but to no avail.

La profesora trató en vano de persuadir al muchacho a ponerse el pañuelo.